libc-lock.h

/* libc-internal interface for mutex locks. Stub version. Copyright (C) 1996,97,99,2000-2002,2003 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */#ifndef _BITS_LIBC_LOCK_H#define _BITS_LIBC_LOCK_H 1/* Define a lock variable NAME with storage class CLASS. The lock must be initialized with __libc_lock_init before it can be used (or define it with __libc_lock_define_initialized, below). Use `extern' for CLASS to declare a lock defined in another module. In public structure definitions you must use a pointer to the lock structure (i.e., NAME begins with a `*'), because its storage size will not be known outside of libc. */#define __libc_lock_define(CLASS,NAME)#define __libc_lock_define_recursive(CLASS,NAME)#define __rtld_lock_define_recursive(CLASS,NAME)#define __libc_rwlock_define(CLASS,NAME)/* Define an initialized lock variable NAME with storage class CLASS. */#define __libc_lock_define_initialized(CLASS,NAME)#define __libc_rwlock_define_initialized(CLASS,NAME)/* Define an initialized recursive lock variable NAME with storage class CLASS. */#define __libc_lock_define_initialized_recursive(CLASS,NAME)#define __rtld_lock_define_initialized_recursive(CLASS,NAME)/* Initialize the named lock variable, leaving it in a consistent, unlocked state. */#define __libc_lock_init(NAME)#define __libc_rwlock_init(NAME)/* Same as last but this time we initialize a recursive mutex. */#define __libc_lock_init_recursive(NAME)#define __rtld_lock_init_recursive(NAME)/* Finalize the named lock variable, which must be locked. It cannot be used again until __libc_lock_init is called again on it. This must be called on a lock variable before the containing storage is reused. */#define __libc_lock_fini(NAME)#define __libc_rwlock_fini(NAME)/* Finalize recursive named lock. */#define __libc_lock_fini_recursive(NAME)/* Lock the named lock variable. */#define __libc_lock_lock(NAME)#define __libc_rwlock_rdlock(NAME)#define __libc_rwlock_wrlock(NAME)/* Lock the recursive named lock variable. */#define __libc_lock_lock_recursive(NAME)#define __rtld_lock_lock_recursive(NAME)/* Try to lock the named lock variable. */#define __libc_lock_trylock(NAME) 0#define __libc_rwlock_tryrdlock(NAME) 0#define __libc_rwlock_trywrlock(NAME) 0/* Try to lock the recursive named lock variable. */#define __libc_lock_trylock_recursive(NAME) 0/* Unlock the named lock variable. */#define __libc_lock_unlock(NAME)#define __libc_rwlock_unlock(NAME)/* Unlock the recursive named lock variable. */#define __libc_lock_unlock_recursive(NAME)#define __rtld_lock_unlock_recursive(NAME)/* Define once control variable. */#define __libc_once_define(CLASS, NAME) CLASS int NAME = 0/* Call handler iff the first call. */#define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \ do { \ if ((ONCE_CONTROL) == 0) { \ INIT_FUNCTION (); \ (ONCE_CONTROL) = 1; \ } \ } while (0)/* Start a critical region with a cleanup function */#define __libc_cleanup_region_start(DOIT, FCT, ARG) \{ \ typeof (***(FCT)) *__save_FCT = (DOIT) ? (FCT) : 0; \ typeof (ARG) __save_ARG = ARG; \/* close brace is in __libc_cleanup_region_end below. *//* End a critical region started with __libc_cleanup_region_start. */#define __libc_cleanup_region_end(DOIT) \ if ((DOIT) && __save_FCT != 0) \ (*__save_FCT)(__save_ARG); \}/* Sometimes we have to exit the block in the middle. */#define __libc_cleanup_end(DOIT) \ if ((DOIT) && __save_FCT != 0) \ (*__save_FCT)(__save_ARG); \#define __libc_cleanup_push(fct, arg) __libc_cleanup_region_start (1, fct, arg)#define __libc_cleanup_pop(execute) __libc_cleanup_region_end (execute)/* We need portable names for some of the functions. */#define __libc_mutex_unlock/* Type for key of thread specific data. */typedefint __libc_key_t;
/* Create key for thread specific data. */#define __libc_key_create(KEY,DEST) -1/* Set thread-specific data associated with KEY to VAL. */#define __libc_setspecific(KEY,VAL) ((void)0)/* Get thread-specific data associated with KEY. */#define __libc_getspecific(KEY) 0#endif /* bits/libc-lock.h */